Grinding wheel dresser



Sept. 20, 1932- H. H. DOVELL ET AL GRINDING WHEEL DRESSER Filed March 19, 1931 L L E c max Y. T: m Ngsr w 1 A 72 0% H n Y B Patented Sept. 20, 1932 'UNETE srerss HUNTER H. DOVE ILL, EOI BERT S. MCCONNELL AND HENRY HENZ, OF URBANA, OHI O AS- SIGNOR-S T0 GEORGE MCOONNELL, DOING BUSINESS AS THE DESMOND-SEEE'PHAN MFG 00., OF URBANA, OHIO GRINDING WHEEL DRESSER Application filed March 19, 1931. Serial No. 523,676.

This invention relates to improvements in grinding wheel dressers, and has for its object to provide a plurality of rotatable discs adapted to be pressed against the periphery of a grinding wheel to remove the irregularities on the face of the wheel to renew its natural working surface.

It is an object of this invention to provide an apparatus that has supported thereon a plurality of rotating discs supported in such a manner that when they are held against the periphery of the wheel they will, in their rotation on the periphery of the wheel, move transversely and rotatably over the periphery.

It is particularly the object of this invention to provide, in connection with a grinding wheel dresser, a handle which has on one end thereof a frame carrying a shaft, and on this shaft a plurality of discs is located so that the discs are arranged diagonally with respect to the axle and rotate with the axle.

These and other advantages will appear from the following description taken in connection with the drawing, which discloses a preferred embodiment of this tool.

Referring to the drawing:

Figure 1 is a top plan view of this tool with the handle partly broken away. 7

Figure 2 is a section on the line 22 of Figure 1.

Figure 3 is an end elevation looking toward the top of Figure 1.

Figure 4 is a view of the shaft and the diagonally disposed cutting discs arranged thereon. The shaft and the discs have been rotated 180 degrees from the position shown in Figure 1.

This tool consists essentially of a handle 1 having on one end thereof a cross head 2 and a pair of arms 3 projecting from and constituting part of the cross head. One arm 3 projects from each end of the cross head 2, and has on its outer or free end a leg or-sup port 4 for supporting the end of the tool when in use. On the free ends of the arms 3 are beari gs formed by thefl'arms and bearing caps 5. Ball or roller bearings may be ernployed.

These means of screws 6. Located in the bearings is a shaft 7, each end of which is en ported by one of the arms 3 and its cap 5. T i is shaft is supported for free rotation inits hearings and has intermediate its ends and between the arms 3 a plurality of cutting discs 8. On the periphery of each disc is a plurality of teeth 9. These discs are made of hard material so that the teeth will roughen the surface of the grinding wheel when brought into contact therewith. V

Between the discs and each arm 3 is a sleeve 10. These sleeves fit around the shaft and are attached thereto by me'ans of pins' 11. The surface of each sleeve adjacent the arm 3 i parallel to an adjacent surface of the arm 3 and perpendicular to the axis of the shaft. The surfa'ce of each sleeve adjacent the plurality of discs is diagonal, as indicated by the numeral 12, so that when these sleeves are pressed against the discs they are held on the shaft in a diagonal position with relation to the axis of the shaft. This diagonal position of the discs is shown in Figures 1 and 4. When the sleeves are prop v er ly positioned for holding the cutting discs in a diagonalposition th'ediagonal faces of the sleeves are in parallel planes, which are therpselves diagonal with relation to the sha t.

In use the tool is brought against the periphery of some grinding wheel and sup ported by-means of the legs 4. As the grinding wheel rotates the hard teeth will remove from the periphery of the Wheel uneven parts andprojections. As the wheel rotates andcauses the discs to rotate the path made by the discs on the periphery of the wheel is the form of a curve, and since the periphery of the wheel is not .amultiple of bearing caps are held to the arms by the periphery of the cutting discs a large number of rotations of the wheel will cause the cutting discs to pass entirely over the periphery of the grinding wheel transversely so that the whole peripheral area thereof has been acted upon by the sharp teeth of the toothed discs. This tool is held in one position so that the parts that are uneven are successively cut down and removed and the slick and wornparts of the .wheel roughened so that the wheel is fit for grinding use.

We desire to comprehend Within our invention such modifications as may be embraced within our claims and the scope of our invention.

Havlng thus fully descrlbed our invention, What we claim as new and desireto secure by Letters Patent, is:

7. A grinding wheel dresser comprising a cylindrical toothed thick rotating cutting member having a continuous concentric cutting periphery adapted to contact with the periphery of the wheel and be rotated thereby, the ends of said cutting member being in parallel planes that are at an oblique angle to the axis of rotation of the cutting member.

In testimony whereof, we aflix our signatures.

HUNTER H. DOVELL. ROBERT S. MGCONNELL. HENRY HENZ. Y

1. In a grinding wheel dresser, a frame having a pair of arms and a supporting leg on each arm, a shaft in the frame, and a plurality ofdiagonally disposed toothed contacting thick cutting discs on the shaft.

2. In a grinding wheel dresser, a frame having a pair of supporting legs thereon,

a shaft in the frame, a plurality of toothed contacting thick discs on the shaft, and means on the shaft on each side of the discs to hold the discs diagonally on the shaft.

3. Ina grinding wheel dresser, a shaft, means to support the shaft, a plurality of contacting thick discs onthe shaft, each disc having thereon V-shaped teeth, and a sleeve on the shaft adjacent each end thereof, each sleeve having a diagonal surface at one end to engage a disc so that the discs. are held diagonally on theshaft.

4..In a grinding wheel dresser, a frame having a handle thereon and a pair of arms, a shaft rotatably supportedby the arms, a plurality of contacting toothed discs on said shaft, each disc being thick and having on its periphery V-shaped teeth, and a sleeve on the shaft adjacent each end thereof, each sleeve having, a diagonal surface at one end to engage a disc-so that the discs are held diagonally on the shaft.

5. In. a. grinding wheel dresser, a frame having a handle thereon and a pair of arms, a supporting leg on each arm, a shaft rotatably supported in the arms,1a plurality of relatively thick toothed discs engaging each other on said shaft, and a sleeve on said shaft adjacent each end, each sleeve having a diagonal surface at one end to engage an adjacent disc so that the discs are held in a diagonal position. on the shaft; 7 V a 6. A grinding wheel dresser comprising an axle, and a plurality of thickcontacting toothed discs supported diagonally on said axle which is adapted to be supported parallel to the axis of the Wheel, said discs being adapted to contact with the periphery of the wheel and be rotated therebywhen the axle is thus vsupported. e v 

